在英语作文中，问候的表达可以根据不同的场合和关系亲疏有所变化。以下是一些常见的问候语：

非正式场合

Hello! / Hi!

How are you？

Fine, thanks. And you？

What's up？

Nice to meet you.

Glad to see you.

正式场合

Good morning / afternoon / evening.

Hello （name）, how are you？

Good day, Sir / Madam.

How do you do？

How are you doing？

It's a pleasure to know you.

特定时间问候

Good morning!

Good afternoon!

Good evening!

朋友或熟人之间

How have you been？

Just so-so. And you？

How's it going？

What's up？

其他常用问候语

Are you Bill Jones？

Yes, I am.

How is Helen？

I'm John Smith.

Nicemeetyou.

Nicemeetyou, too.

May I introduce myself to you？

Is everything going on well？

How is your family？

根据具体的写作场合和对象，可以选择合适的问候语来表达礼貌和尊重。希望这些信息对你有所帮助!